1. In a microwave-safe casserole dish, whisk cornstarch and beef broth until smooth (no lumps).
2. Stir in mushrooms, Worcestershire sauce, and dried basil. Set aside.
3. In a separate bowl, mix egg, bread crumbs, grated onion, seasoned salt, and pepper.
4. Add ground beef to the bread crumb mixture and mix until combined. Shape into 6 patties.
5. Place patties into the casserole dish with the broth/mushroom mixture.
6. Cover with a microwave-safe lid or vented cover and microwave on HIGH for 6–10 minutes, or until patties are cooked through.
7. Halfway through cooking, carefully rotate/turn patties for even cooking.
8. Let stand 2–3 minutes before serving to allow gravy to thicken.

Kid-Friendly Tips

• Kids can whisk the broth mixture and help shape patties (wash hands first!)
• Adults should handle the hot casserole dish and check doneness
• Teach food safety: ground beef should reach 160°F in the center

Serving Ideas

• Serve over mashed potatoes, rice, or egg noodles
• Add steamed peas or green beans on the side

Notes

Microwave cooking times vary by wattage and dish size. If patties aren’t fully cooked, microwave in 1-minute increments. Whisk broth and cornstarch well at the start for the smoothest gravy.