Steak And Baked Potato With Umami Butter

Ingredients

• 2 large steaks (such as rump or sirloin, about 8 oz / 250 grams each)
• 1 teaspoon salt
• 1 tablespoon olive oil
• 1 tablespoon butter
• 2 sprigs rosemary
• 2 cloves garlic
• ½ teaspoon pepper
• 4 large Sebago potatoes (about 220-250 grams / 7-8 oz each, brushed clean and dried, see notes)
• A few pinches of salt (optional)
• 3.5 oz butter (cubed, softened to room temperature, 100 grams)
• 2 cloves garlic (large cloves or use 4 medium cloves)
• 2 teaspoons fish sauce (see notes)
• 1 tablespoon soy sauce (or Tamari for gluten-free)
• 1 tablespoon Worcestershire sauce
• ½ cup grated Parmesan cheese