Preheat oven to 350F. Prepare a 9x13 baking dish with nonstick spray
In a large mixing bowl, combine the chicken, soup, sour cream, garlic and onion powder.
Stir to combine.
Fold in the mixed vegetables and cheddar cheese.
Cut the biscuits into quarters.
Fold the pieces into the chicken mixture gently.
Spread into the prepared 9x13 pan.
Bake for 35-45 minutes or until bubbly and the biscuits are golden brown.
Remove and let cool for 2-3 minutes to set up. Serve warm.