Spiced Lamb Tagine

Name: Spiced Lamb Tagine
Ingredients: 2 lb. boneless lamb shoulder, excess fat trimmed, cut into 2 pieces; Kosher salt; 3 Tbsp. extra-virgin olive oil; 1 large yellow onion, chopped; 1 1½ piece fresh ginger, peeled, finely grated; 4 garlic cloves, thinly sliced; 2 bay leaves; ¼ cup golden raisins; ⅓ cup plus 2 Tbsp. slivered almonds; 2 Tbsp. tomato paste; 1 tsp. ground cinnamon; 1 tsp. ground cumin; ½ tsp. crushed red pepper flakes; ½ tsp. ground turmeric; ¼ tsp. ground cardamom; ½ small red onion, very thinly sliced; 1 cup mint leaves, torn if large; ½ lemon