Matambre a la Pizza (Pizza-Style Flank Steak) | Saveur

Ingredients

• 1 ¹⁄₂ lb. flank steak, sliced in half horizontally and pounded into two 1/4"-thick steaks
• Kosher salt and freshly ground black pepper, to taste
• 5 cups milk
• ¹⁄₄ cup olive oil, plus more for greasing and drizzling
• 1 clove garlic, finely chopped
• 1 small yellow onion, finely chopped
• 1 (28-oz.) can whole peeled tomatoes in juice, crushed
• 1 ¹⁄₂ tsp. crushed red chile flakes
• 1 ¹⁄₂ tsp. finely chopped oregano
• 1 tsp. sugar
• 3 tbsp. finely chopped parsley, plus more for garnish
• 8 oz. shredded mozzarella