We combine the best Italian appetizer with a classic American burger in this paleo-friendly twist on a meal that practically shouts summer. Our members loved this combination so much when it was featured in 2016 that we've brought it back every summer since.
Make vinaigrette - (Skip if made ahead for Monday.) Whisk together vinegar (portion for vinaigrette), maple syrup, and mustard. Add oil while whisking. (Can be done up to 5 days ahead)
Season beef - Mix aminos, garlic powder, and pepper into ground beef and then form into 0.5” / 1.3 cm thick patties. Press thumb into center of the patty, forming a little crater. (Can be done 1 day ahead)
Portobello mushrooms - Remove stem and use the side of a spoon to scrape out gills. (Can be done up to 3 days ahead)
Strawberries - Slice strawberries. (Can be done up to 2 days ahead)
Tomatoes - Slice tomatoes.
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Give patties and mushrooms a light sprinkle of salt and pepper on both sides.
If cooking on a grill: Heat up grill to 500F. Brush grates with some oil and then grill patties and mushrooms for 2 minutes on each side over direct heat (i.e., over the flames). Move patties and mushrooms to indirect heat, close the grill and cook for another 2 to 3 minutes for medium-rare, 3 to 4 minutes for medium, and 5 to 6 minutes for well-done. Mushrooms will take about 3 to 4 more minutes on indirect heat.
If cooking on stovetop: Heat up a grill pan to high heat. Brush with some oil and then grill patties and mushrooms for 2 minutes on each side. Lower heat to medium and cook for another 2 to 3 minutes for medium-rare, 3 to 4 minutes for medium, and 5 to 6 minutes for well-done. Mushrooms will be done after another 4 to 5 minutes on the lower heat setting.
Place patties onto portobellos. Top with basil leaves and tomatoes. Drizzle with vinegar (portion for burger; it’s best to pour into a spoon and then drizzle from spoon).
Toss vinaigrette with spinach, strawberries, and almonds and enjoy with warm 'burger'.