Preheat oven to 375 degrees. Grab a 13x9 casserole dish and place bottom half of slider buns on the bottom of the dish. Spread mayo on the cut side of the bottom half of the buns. Set aside.
In a small bowl, mix salt. pepper. paprika, and garlic powder. Set aside. In a large skillet, heat butter and canola oil over medium high heat. Once butter has melted, add beef and sprinkle with half of the seasoning. Cook until browned, about 3-6 minutes (depending on how thick your beef is cut). Remove beef and place on a plate. Set aside.
With the skillet still on medium high, add onions and peppers. Sprinkle with remaining seasoning and cook until tender, about 6-8 minutes. Add beef to warm back up for about 1 minute. Turn off heat.
Layer beef and vegetable mixture on top of prepared bottom half of buns. Layer on the 8 slices of provolone cheese. Top with other half of slider buns.
Prepare the herb butter topping by melting the 3 tablespoons of butter in the microwave for about 25 seconds. Add Italian seasoning and garlic powder and stir together. Brush a thin layer over the tops of the slider buns.
Cover with aluminum foil and bake in preheated oven for 15 minutes. Remove foil and bake for 3-5 more minutes or until tops get toasted and cheese is melted. Be very careful and watch these sliders so they don't burn on top! Remove from oven, cut sliders, and serve with cold Coca-Cola Zero Sugar and yummy burger sauce (recipe below). If you don't feel like making the full recipe below, I also love just mixing the ketchup and mayo together. It tastes INCREDIBLE with these sliders.