Slice the beef, potatoes, onion, and bell pepper thinly to ensure everything cooks evenly and softens nicely.
Place half of the potato slices evenly on the bottom of the slow cooker, forming a solid base layer.
Add half of the onion and bell pepper slices over the potatoes, then layer half of the beef slices on top.
Sprinkle half of the garlic powder, salt, and black pepper over the layered ingredients to season thoroughly.
Repeat the layering with the remaining potatoes, onions, bell peppers, and beef, finishing with the remaining seasonings.
Pour the beef broth over the assembled layers and drizzle with olive oil to add moisture and richness.
Cover and cook on low for about 4 hours until the potatoes are tender and beef is cooked through.
In the last 15 minutes of cooking, sprinkle the shredded provolone cheese over the top and allow it to melt before serving.