Ahi! — Les Petites Gourmettes

Ingredients

• 1/2 cup packed fresh basil leaves
• 1 garlic clove, peeled
• 1 tablespoon toasted pine nuts
• 1 tablespoon olive oil
• 1 tablespoon fresh lemon juice
• Pinch of salt
• 3 tablespoons water
• Two 6-ounce ahi tuna fillets
• 2 Roma tomatoes, quartered
• 1 medium zucchini, trimmed and cut on the diagonal into 1/4-inch slices
• 1 medium yellow crookneck squash, trimmed and cut on the diagonal into 1/4-inch slices
• 1/2 medium red onion, peeled and cut into 1/4-inch slices
• Salt and freshly ground black pepper
• 1 heart of romaine lettuce, torn into individual leaves