Preheat the oven to 350F, and spray a 9x13 casserole dish with nonstick cooking spray.
Cut each of the 10 small biscuits into 6 pieces each and layer them on the bottom of the casserole dish. Pre-bake the biscuit dough for 20-25 minutes.
In a large frying pan, cook the diced peppers and onion using a little cooking spray for 10 minutes.
In a small pan, melt the butter over medium heat. Stir in the diced garlic and cook for 1 minute. Add in the flour and mix well. Let it cook for 2 minutes - you should smell the flour start to turn brown. Add the milk and seasonings and stir often until the sauce thickens - about 8-10 minutes.
Once the veggies are sauteed, pour over top of the baked biscuit pieces. Then layer on the shredded steak.
Drizzle the garlic cream sauce evenly over the biscuits and steak mixture. Sprinkle the mozzarella cheese on top, cover with foil, and bake in the oven for 5-20 minutes, checking all biscuits are cooked. The time difference will depend on your oven. Since the steak is cooked, you’re just ensuring the cheese is melted and the biscuits are fully cooked.
Drizzle with ranch dressing. Cut into 6 equal servings. Enjoy!