INGREDIENTS
1/2 cup
Baby arugula
2
Garlic cloves
3/4 cup
Onion
6 oz
Presliced cremini mushrooms
2 tsp
Thyme, fresh
1
Egg, large
1 1/2 tbsp
Canola mayonnaise
4 tsp
Dijon mustard
1/2 tsp
Black pepper, freshly ground
1/4 tsp
Kosher salt
1 tbsp
Olive oil, extra-virgin
5
Hamburger buns, regular or whole-wheat toasted and divided
1 oz
Goat cheese
1
pouch precooked black beluga lentils (such as archer farms)