Cheeseburger style grilladerie

Roughly chop mushrooms. In a small bowl, combine mayo with mustard. Set aside.

In a medium bowl, combine beef and 1 tsp steak spice (dbl for 4ppl). Form mixture into two 5-inch wide patties (4 patties for 4 people). Heat a large non-stick pan over medium heat. When hot, add 1/2 tbsp oil (dbl for 4ppl), then patties. Pan-fry, until cooked through, 4-5 min per side.** Remove pan from the heat then transfer patties to one side of another baking sheet. Sprinkle patties with cheese. Set aside.

Heat same pan over medium heat. When hot, add 1 tbsp butter (dbl for 4ppl), then mushrooms. Cook, stirring occasionally, until softened, 5-6 min. Sprinkle flour over mushrooms. Cook, stirring often, until mushrooms are coated, 1-2 min. Add 1/2 cup water (dbl for 4ppl) and broth concentrate(s) to the pan with mushrooms. Cook, stirring often, until sauce thickens, 2-3 min. Season with remaining steak spice.

While saucy mushrooms cook, cut each bun in half then arrange on other side of baking sheet with patties, cut-side up. (NOTE: for 4 ppl, toast buns first, then set aside.) Toast buns and patties in the top of the oven until the cheese melts, 3-4 min. (TIP: Keep your eye on them so they don't burn!)