Preheat the grill.
Grate 1/2 white onion.
Combine the ground beef and grated onion with the minced garlic, parsley, paprika, cumin and salt in a medium mixing bowl. Form into 4 patties.
Place the patties on the grill tray or veggie basket. See note about ways to keep patties together when grilling. Grill for 5 to 6 minutes per side, or until internal temperature should reach 165 F.
While the burgers are cooking, caramelize the2 other onions in a small skillet. Slice the onions into half-moons, then add the olive oil and sugar to skillet and saute the onion slices over low heat for 20 - 30 minutes. Stir every few minutes.
Prepare fresh veggies.
Serve Moroccan Burgers with caramelized onions and a side of chips and veggies.
Special Notes: If you dont have a tray for your grill, put the patties in the freezer for 30 minutes to help them firm up and hold together better when grilling. Or you could grill them from partially frozen. Alternative cooking method: wrap the patties tightly in foil and place them in a 350 F oven for about 5 10 minutes until the desired temperature is reached.