Roasted Garlic Tomato Soup with Grilled Cheese Croutons
Silky slow-roasted Roma tomato and sweet garlic soup crowned with bite-sized golden, gooey grilled cheese croutons.
In a nutshell: This authentic american roasted garlic tomato soup with grilled cheese croutons comes together in just 55 mins using simple whole ingredients. The chef's secret is to Squeezing caramelized, mellow roasted garlic cloves directly into the soup provides sweet . Perfect for home cooks seeking a dependable, restaurant-quality finish with minimal effort.
Experience the ultimate rainy-day comfort food with this Roasted Garlic Tomato Soup topped with Grilled Cheese Croutons. Vine-ripened Roma tomatoes, sweet whole heads of garlic, and caramelized onions are roasted on a sheet pan until charred and concentrated, then blended with vegetable broth, heavy cream, and fresh basil into a velvety soup. Topped with crispy bite-sized grilled cheese croutons with melting sharp cheddar, it's nostalgia elevated to culinary art.
Key Equipment
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- Large rimmed baking sheet
- High-speed blender or immersion blender
- Large soup pot
- Skillet for grilled cheese
- Chef's knife and cutting board
Chef's Pro-Tips
- Roast whole garlic heads cut-side down: Squeezing caramelized, mellow roasted garlic cloves directly into the soup provides sweet depth without harsh raw garlic bite.
- Roast tomatoes cut-side up: Allowing tomato juices to concentrate and lightly char on the edges multiplies rich umami flavor ten-fold.
- Use sourdough for grilled cheese croutons: Sourdough holds its crisp exterior even when floating in hot tomato soup without getting soggy.
- Cut sandwiches while still warm: Let the grilled cheese cool for 2 minutes, then slice into neat 1-inch bite-sized squares using a sharp chef's knife.
Ingredients
4
servings
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3 lbs fresh Roma or plum tomatoes, halved lengthwise
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1 whole head garlic, top 1/4 inch sliced off to expose cloves
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1 medium yellow onion, cut into wedges
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3 tbsp extra virgin olive oil, for roasting
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2 ½ cups low-sodium vegetable or chicken broth, warmed
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½ cup heavy whipping cream, for silky texture
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½ cup fresh basil leaves, packed
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1 tsp Italian seasoning, dried oregano, thyme, basil
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1 tsp kosher salt, to taste
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½ tsp freshly cracked black pepper, to taste
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4 slices artisan sourdough bread, for croutons
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1 ½ cups sharp yellow cheddar cheese, freshly shredded
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2 tbsp unsalted butter, for pan-toasting sandwiches
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Step-by-Step Instructions
Roast Tomatoes & Garlic
Preheat oven to 400°F (200°C). Place halved tomatoes, onion wedges, and the trimmed garlic head on a large rimmed baking sheet. Drizzle with 3 tbsp olive oil, Italian seasoning, salt, and black pepper. Roast for 35 to 40 minutes until tomatoes are tender, caramelized, and lightly blistered on the edges.
Blend Silky Soup
Squeeze the soft caramelized garlic cloves out of their skins into a high-speed blender. Add roasted tomatoes, onions, any pan juices, fresh basil, and 2 cups warm vegetable broth. Blend on high speed for 1-2 minutes until silky smooth and emulsified.
Simmer & Add Cream
Pour pureed soup into a soup pot over medium-low heat. Stir in heavy cream and remaining 1/2 cup broth (if needed to adjust thickness). Simmer gently for 5 minutes. Taste and adjust salt and pepper.
Make Grilled Cheese Croutons
Butter outside of sourdough slices. Fill with shredded sharp cheddar and toast in a skillet over medium heat for 3-4 minutes per side until golden brown and melted. Transfer to a cutting board, let rest for 2 minutes, and slice into 1-inch crouton cubes.
Ladle, Crown & Serve
Ladle warm soup into deep bowls. Swirl a splash of cream over top, garnish with fresh basil chiffonade, and crown generously with hot, melty grilled cheese croutons!
Chef Clara's Kitchen Picks
Kitchen EssentialsAs an Amazon Associate I earn from qualifying purchases.
Nordic Ware Naturals Half Sheet, 2-Pack
Warp-resistant aluminum for even browning, from sheet-pan dinners to cookies.
View on AmazonVictorinox Fibrox Pro 8" Chef's Knife
Razor-sharp Fibrox Pro blade that home chefs and pros both reach for.
View on AmazonTILUCK Stainless Measuring Cups & Spoons, 10-Pc
Stainless steel cups and spoons that measure precisely and last.
View on AmazonMercer Culinary Locking Tongs, 9" + 12"
Locking tongs in two handy sizes for the stovetop and the grill.
View on AmazonAmazon Basics Non-Stick Parchment Paper Roll
Non-stick paper for lining pans – easy release, easy cleanup.
View on AmazonWoodenhouse Teak Wooden Spoons, 10-Pc
Teak spoons gentle on cookware and built for daily stirring.
View on AmazonOXO Good Grips Silicone Whisk Set, 9" + 11"
Silicone whisks safe for nonstick pans, in two sizes.
View on AmazonUltra Cuisine Stainless Cooling Rack Set of 2
Stainless racks that fit half sheets – for cooling bakes and crisping roasts.
View on AmazonUmite Chef Stainless Mixing Bowls with Lids, 8-Pc
Nesting stainless bowls with airtight lids, from prep to storage.
View on AmazonHamilton Beach 6-Speed Electric Hand Mixer
Six speeds with a snap-on storage case for the beaters.
View on AmazonFrequently Asked Questions
Yes! In the winter, roast 2 cans (28 oz each) of whole San Marzano tomatoes drained of juices on your baking sheet with the garlic and onions.
Yes! Swap heavy cream for full-fat coconut milk or soaked blended cashews, and make grilled cheese croutons using vegan cheddar and dairy-free butter.
Yes! Freeze soup without the croutons in airtight containers for up to 3 months. Make fresh grilled cheese croutons upon serving.