Chicken and Bean Burritos

Name: Chicken and Bean Burritos
Ingredients: 1/2 cup brown rice; 2 cloves garlic; 1 smashed, 1 minced; Kosher salt and freshly ground pepper; 1/2 pound (about 2 cups) frozen diced butternut squash, thawed; 1 cup shredded rotisserie chicken, skin removed; 1 15-ounce can black beans; 1 cup grape tomatoes; 1/2 cup fresh cilantro; 1/4 cup pickled jalapeno peppers, plus 2 tablespoons pickling liquid; 4 8-inch whole-wheat tortillas, warmed; 1/2 cup shredded reduced-fat cheddar cheese; 1 avocado, sliced; Plain low-fat yogurt or sour cream, for serving (optional)