• 1/3 cup mayonnaise
• 1/2 cup basil leaves
• Sea salt and freshly ground pepper , to taste
• 1/2 teaspoon fresh lemon juice
• 4 slices bacon
• 4 slices (1-inch-thick) sourdough bread
• 4 slices (3/4-inch-thick) beefsteak tomato

In the bowl of a food processor with knife blade attached, combine mayonnaise, basil leaves, 1/4 tsp. salt, and lemon juice. Puree until smooth. Transfer to a bowl and refrigerate until ready to use.

In a large skillet over medium-low heat, cook bacon until very crispy. Transfer to a paper-towel-lined surface; when cool, break into 1/4-inch chunks.

Toast bread. Spread each slice with about 1 Tbsp. basil mayonnaise. Sprinkle with bacon, dividing it evenly among the 4 sandwiches. Top each with a tomato slice and season with sea salt and pepper before serving.