Spicy Lamb Pizza With Parsley–Red Onion Salad

Name: Spicy Lamb Pizza With Parsley–Red Onion Salad
Ingredients: 2 garlic cloves, finely grated; 1/4 cup tomato paste; 3/4 teaspoon ground cinnamon; 3/4 teaspoon ground cumin; 3/4 teaspoon smoked paprika; 3/4 teaspoon kosher salt, plus more; 12 ounces ground lamb; All-purpose flour (for dusting); 8 ounces prepared pizza dough, cut in half, room temperature; 2 tablespoons olive oil, divided, plus more for drizzling; 1/2 small red onion, thinly sliced; 1 cup parsley leaves with tender stems; 1 tablespoon fresh lemon juice; Crushed red pepper flakes (for serving)