Build-Your-Own Burger Bar

While potatoes roast, trim and discard root end from lettuce; separate leaves. Set larger leaves aside; finely slice remaining leaves crosswise. Thinly slice tomato into rounds; transfer to a plate and season all over with salt and pepper.

Heat a large dry pan over medium-high heat. Add bacon*; cook, turning occasionally and adjusting heat if browning too quickly, until crispy, 6-10 minutes. Turn off heat; transfer to a paper-towel-lined plate. Wipe out pan.

In a large bowl, combine beef*, stock concentrate, onion powder, ½ tsp salt (¾ tsp for 4 servings), and pepper. Form into two patties (four patties for 4), each slightly wider than a burger bun.

Heat a drizzle of oil in a large pan over medium-high heat. Add patties (depending on the size of your pan, you may need to work in batches) and cook to desired doneness, 3-5 minutes per side (reduce heat to medium and cover if patties begin to brown too quickly). TIP: To make cheeseburgers, in the last 1-2 minutes of cooking top patties with cheddar; cover pan to melt cheese.

Use pan used for bacon here.

While patties cook, halve and toast buns; transfer to a serving platter. TIP: Begin setting up your burger bar with toppings if potato wedges and patties are still cooking!