Grilled Lamb Burgers with Red Onion Aïoli | Saveur

Ingredients

• 1 ¹⁄₂ lb. ground lamb
• 1 ¹⁄₂ tsp. ground cumin
• Kosher salt and freshly ground black pepper, to taste
• 5 cloves garlic, peeled and wrapped in aluminum foil
• 1 large red onion, sliced crosswise into ¼"-thick rings
• 1 cup olive oil
• 2 egg yolks
• Juice and zest of 1 lemon
• ¹⁄₂ cup canola oil
• 2 medium ripe Hass avocados
• Juice of 1 lime
• 4 hamburger buns, split
• Thinly sliced romaine lettuce and tomatoes, for serving
• 4 fried eggs, for serving