2 c. chopped veggies of your choice (I used peppers, mushrooms, zucchini and broccoli
5-8 oz chicken breast, cut into chunks
apple cider vinegar
Mix olive oil and vinegar, using 1:1 ratio. (I used 2 tsp of each.) Add mustard to taste (I used dijon mustard). Whisk all together until smooth. Place veggies and chicken into small baking dish, then add mustard sauce and stir to combine. Cook at 350 about 20-30 minutes, depending on how big your chunks of chicken are.
I love casseroles, and this satisfied my casserole craving.