Zesty Philly Cheesesteak Skillet

Bahan-bahan (4 porsi)

• 1 pound flank steak, thinly sliced into bite-sized pieces
• 2 teaspoons low-sodium soy sauce
• 3 tablespoons avocado oil, divided
• 1 medium yellow onion, thinly sliced
• 1 small green bell pepper, thinly sliced
• 1 small red bell pepper, thinly sliced
• 8 ounces baby bella mushrooms, quartered
• 1 cup (4 ounces) shredded provolone cheese
• 1 teaspoon each: fine sea salt, garlic powder, paprika
• 1/2 teaspoon each: chili powder, onion powder
• 1/4 teaspoon each: black pepper, celery seed (optional)