In a bowl, combine the breadcrumbs, flour, Parmesan cheese, basil, garlic powder, and onion powder.
Heat a large skillet over medium heat and add the butter and olive oil. Sauté the bell pepper, mushrooms, onion, and garlic until softened and fragrant, then remove the vegetables from the skillet and set aside.
Season the venison steaks with salt and pepper, then press them into the breadcrumb mixture. Add a little more olive oil to the skillet and fry the venison until nicely browned, about 90 seconds per side.
Return the vegetables to the skillet. Sprinkle in the brown gravy mix and add the water, stirring well to combine. Reduce the heat to low, cover, and simmer the venison for 15 minutes, or until fork-tender.
Serve hot with garlic sourdough bread or creamy mashed potatoes, and garnish with chopped Italian parsley for a fresh, vibrant finish.