Preheat the oven to 350 degrees. Spray a 9 by 5 inch loaf pan with gluten free nonstick cooking spray, then line with parchment paper, letting the paper overhang the edges by a couple of inches on each side.

Peel the potatoes and cut into 1-inch pieces. Place in a pot of salted water and bring to a boil. Continue to boil gently until the potatoes are fork tender, about 10 minutes. Drain and reserve.

In a large skillet over high heat, heat the olive oil. Add the mushrooms and cook, stirring occasionally, until browned, about 10 minutes. Reduce heat to medium, add the onions, carrots, and bell pepper, and cook until tender, about 10 minutes.

Add the garlic and reserved potatoes. Cook, smashing the potatoes with a fork, for another minute. Add the boiling water, steak sauce, and Kim’s Simple Meals Homestyle Burger mix. Cook, stirring, for another minute or two, until fully combined. Put the mixture into the prepared pan, pressing to compact the loaf. Spread the remaining 1/3 cup steak sauce over the top.

Bake for 40 minutes. Let cool in the pan for 5 minutes, remove from pan and serve.