
Cut the steak into 1-inch cubes and the zucchini and onion into chunks. Stir the mayo and sriracha together with a splash of water for a dipping sauce.
Heat a large skillet or griddle over high heat with 1 tbsp butter and cook the vegetables 6-7 minutes with 1 tbsp tamari until browned; move to a platter.
Add 1 tbsp butter and sear the steak 3-4 minutes, then push aside and cook the shrimp 2-3 minutes until pink.
Add the remaining butter, the garlic and remaining tamari and toss everything for 30 seconds.
Serve the steak and shrimp with the vegetables and the spicy mayo on the side (kids may prefer plain butter-garlic).
Photo: DinnerDrop