Steak Pizzaiola

Ingredients

• 1 1/4 pounds sirloin steak
• Salt
• 2 tablespoons extra-virgin olive oil
• 4 cloves garlic, smashed
• 1 large onion, sliced 1/4 inch thick
• 2 bell peppers (1 red, 1 yellow), sliced 1/2 inch thick
• 4 jarred pepperoncini, drained and thinly sliced
• 1 15-ounce can crushed tomatoes
• 1/2 teaspoon dried oregano
• Pinch of red pepper flakes
• 2 tablespoons chopped fresh parsley
• Bread, for serving (optional)