For the steak sauce: 

1. Melt butter over medium heat in a small saucepan. Add horseradish adn Worcestershire sauce and cook until it thickens, about 10 mins. 
2. Then, stir in ketchupk, lemon juist, and Tabasco sauce and cook over low heat. 
3. Cover the top - it will pop! 
4. Delicious as a marinade while grilling. 

For the cauliflower steaks (each cauliflower usually yields 2 good steaks, plus extra cauliflower for sautéing etc.) 

1. Preheat oven to 450 F. 
2. Prepare cauliflower - remove most of the big leaves but DO NOT remove the base of the stem yet. There will still be a few leaves - that's ok. Place cauliflower head right side up (like a tree) and slide through the middle. 1/2 - 1 in to each side of your first cut, make another slice. These should be your two main steaks. Remove the stem and remaining leaves. You can still roast/sauté the rest of the cauliflower if it doesn't stay together. 
3. Sprinkle cauliflower with salt and pepper, and rub on some olive oil. Roast for 20-30 mins on each side, or until soft (pierce with a fork to test) 
4. Heat olive oil in a nonstick pan. When hot, place cauliflower steak in the pan (like you would an actual steak), and let cook for 3-5 mins on each side, or until it starts to brown. 
5. Top with steak sauce, and enjoy!