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Two halves of a basil may and tomato sandwich stacked on top of each other on a wooden board.

Tomato Sandwich with Basil Mayo

This tomato sandwich with basil mayo is the ultimate summer lunch. There’s something particularly delicious and satisfying about ripe summer tomatoes and mayo sandwiched between slices of thick, crusty bread, the juice running down your arms as you go in for another bite. Our lemony basil mayo takes this classic tomato sandwich to the next level, adding fresh herby flavor that pairs perfectly with peak-season tomatoes.
Prep Time:25 minutes
Course: Lunch, Main Course
Cuisine: American
Keyword: Sandwich
Servings: 2 sandwiches

Equipment

  • Immersion blender

Ingredients

Basil Mayo

  • 1 cup mayonnaise Duke’s or Best Foods/Hellmann's
  • 1 cup fresh basil leaves
  • ½ tbsp lemon juice
  • ¼ tsp pepper

Tomato Sandwich

  • 4 slices sourdough bread lightly toasted
  • 4 slices heirloom tomato or favorite large variety, sliced thick
  • 8 tbsp prepared basil mayo divided
  • Flaky sea salt to taste

Instructions

Basil Mayo

  • In a high sided container, add the mayo, lemon juice, pepper, and basil and blend it all up with an immersion blender.
    1 cup mayonnaise, 1 cup fresh basil leaves, ½ tbsp lemon juice, ¼ tsp pepper
  • Note: This recipe makes about 1 cup of basil mayo, which is enough for 4 to 6 sandwiches.

Sandwich

  • To make 2 sandwiches, take two pieces of toasted bread and spread about 2 tablespoons of basil mayo onto each piece.
    4 slices sourdough bread, 4 tbsp prepared basil mayo
  • Place 4 thick slices of tomato on top of the basil mayo on each slice of bread, then season the tomatoes with flaky sea salt.
    4 slices heirloom tomato, Flaky sea salt
  • Spread 2 more tablespoons of basil mayo onto each of the other bread slices and use the bread to top each sandwich.
    4 tbsp prepared basil mayo
  • Cut the sandwiches in half and enjoy!

Notes

This recipe makes about 1 cup of basil mayo, which is enough for 4 to 6 sandwiches.

Tips: 

  • Use the ripest tomatoes you can find. They should be firm with a little give. 
  • Don't skip salting the tomatoes. We use Maldon flaky salt for a little texture, but table salt or sea salt work well too.
  • Slice tomatoes thick enough that they stay juicy and substantial.
  • Use toasted bread. Toasting the bread helps keep the sandwich from getting soggy. 
  • Serve right away for the best experience, and keep plenty of napkins nearby.

Serve With: