Add sliced beef to a large bowl, season with salt, pepper, onion powder and toss to coat. Sprinkle 2 Tbsp flour, toss to coat.
2. Step
Place a pot over medium-high heat, drizzle olive oil. Once hot, add half the sirloin in, brown, remove onto a plate to hold, then repeat with the remaining sirloin. Set aside.
3. Step
Add more oil to the pot, add sliced onions, add pinch of salt and pepper, and caramelize the onions, stirring frequently to avoid burning.
4. Step
Once the onions are softened, add mushrooms and continue sautéing until cooked.
5. Step
Stir in dried thyme and garlic.
6. Step
Sprinkle remaining 2 Tbsp. of flour onto mixture, stir to combine, then add beef stock. Reduce heat to medium-low, and simmer for 10 minutes.
7. Step
Mix in heavy cream, then add beef, along with juices, stir to combine.
8. Step
Ladle stew into hollowed out sourdough bowls, top with slice of provolone, then broil until the cheese is brown and melted.
