preheat oven 350°f

combine taco seasoning,water and lime juice and stirr well

pour half taco seasoning over the shredded chicken and half over pep,and onion

cook chicken in large skillet over medium -high heat until the sause thickens slightly. Remove chicken and keep warm, Add pep and onion and cook until sauce thickens and veggies start to wilt.

lay tostada shells on an ungreased baking sheet

Top each shell 2 tablespoons refried beans, 1/4 cup shredded chicken, pep, and onion and Cheddar cheese

Bake until the cheese just starts to melt. Remove from oven and serve with garnishes