Tomahawk steak with porcini mustard rub

Name: Tomahawk steak with porcini mustard rub
Prep time: 10 min
Cook time: 1 h 50 min
Total time: 1 h 50 min
Yield: 4 portions
Ingredients: 10 g dried porcini mushrooms; 1 tsp sea salt flakes; 1 tsp mustard powder; 1 tsp dried oregano; ½ tsp whole black peppercorns; ½ tsp sweet paprika; 1 tbsp Dijon mustard; 1 tomahawk steak; extra virgin olive oil; sea salt flakes; 8 garlic cloves; 2 tbsp unsalted butter; 3 sprigs fresh thyme