Smothered-With-Love Round Steak

Ingredients

• 1 tablespoon olive oil
• 1 1/2-2 pounds beef round steak, boneless and pounded to a 1/2-inch thickness
• 1 tablespoon butter
• 1 (8-ounce) carton fresh mushrooms, sliced
• 1 sweet onion, diced
• 1 clove garlic, minced or pressed
• 2 1/2 cups low-sodium beef broth, plus more, to taste
• 1 tablespoon Worcestershire sauce
• 1/2 (1-ounce) packet dry onion soup mix
• 2 sprigs fresh thyme, plus more, to taste, for garnish
• 1 sprig fresh rosemary, plus more, to taste, for garnish
• 1 tablespoon cornstarch
• 1 tablespoon cold water
• kosher salt, to taste
• black pepper, to taste