Season chicken with garlic and set aside
Heat dairy-free margarine in a large skillet
Cook onion and mushroom over medium-high heat, remove from pan and set aside
Brown chicken breasts, sprinkle with lemon juice, paprika, salt and pepper
Return onion and mushroom mixture to the pan
Cover and cook on low for 30 minutes or until chicken is cooked and tender
Remove chicken from pan and keep warm
Make the sauce – add gluten-free flour to the onions and mushrooms
Stir and cook about 1 minute
Add dairy-free milk and stir, simmer until thickened
Stir in dairy-free sour cream, taste and add more paprika if desired
Return chicken to sauce and heat through, do not boil