Spiced Ground Lamb on Warm Lentil Hummus

Name: Spiced Ground Lamb on Warm Lentil Hummus
Ingredients: 1 lb. ground lamb (or dark meat ground turkey); 3 tbsp. shawarma seasoning; 3 large cloves garlic, grated, divided; Kosher salt; 3 1/2 tbsp. olive oil (4 tbsp. if using ground turkey), divided; 3/4 c. split red lentils (masoor dal); 1/2 tsp. ground cumin; 1/4 c. plus 2 tbsp. fresh lemon juice, plus lemon wedges for serving; 1/3 c. tahini; Pinch of cayenne pepper; 1/2 c. cilantro, chopped; 2 heads Little Gem lettuce, leaves separated; 4 small Persian cucumbers, quartered; Halved cherry tomatoes and sliced red onion, for serving