3 lamb burgers spices yogurt mint Recipes

boneless lamb shoulder, trimmed and cut into 1-inch pieces, olive oil, divided, chopped onion, chopped shallots, minced garlic, divided, ground cumin, ground coriander, ground cardamom, ground mustard, ground turmeric, ground red pepper, grated whole nutmeg, chopped fresh mint, divided, kosher salt, divided, red bell peppers, low-fat greek-style plain yogurt, fresh lemon juice, freshly ground black pepper, divided, hamburger buns, toasted, torn radicchio

ground lean lamb, yellow onion, finely chopped, fresh breadcrumb (fine ), chopped fresh mint, garlic cloves, finely chopped, ground cumin, ground coriander, salt (plus more to taste), ground cayenne pepper, tomato, diced, chopped fresh cilantro, whole wheat pita bread, plain yogurt (whole milk or low fat), alfalfa sprout