Veggie Pockets

Name: Veggie Pockets
Ingredients: 1 15 ounce can lima beans, rinsed; 1 ½ cups corn kernels; 1 ⅓ cups sugar snap peas, blanched then halved; 16 grape tomatoes, halved; 2 tablespoons olive oil; 2 tablespoons fresh lemon juice; 4 pita breads, halved; 16 Bibb lettuce leaves