Gratinated asparagus in papillote with herb butter

Ingredients

• 100 gr hard butter (without salt)
• 1 tbl spoon parsley (fresh chopped)
• 1 tbl spoon basil (fresh chopped)
• 1 tbl spoon oregano (fried)
• salt and pepper
• 500 gr white asparagus
• 400 gr green asparagus
• 100 gr grated cheese
• 16 vine tomatoes
• 1 tbl spoon olive oil