Whole Wheat Orzo Salad Recipe

2-1/2 cups uncooked whole wheat orzo pasta (about 1 pound) 1 can (15 ounces) white kidney or cannellini beans, rinsed and drained 3 medium tomatoes, finely chopped 1 English cucumber, finely chopped 2 cups (8 ounces) crumbled feta cheese 1-1/4 cups pitted Greek olives (about 6 ounces), chopped 1 medium sweet yellow pepper, finely chopped 1 medium green pepper, finely chopped 1 cup fresh mint leaves, chopped 1/2 medium red onion, finely chopped 1/4 cup lemon juice 2 tablespoons olive oil 1 tablespoon grated lemon peel 3 garlic cloves, minced 1/2 teaspoon pepper