Mariu's Spaghetti with Meat Sauce

INGREDIENTS

• 2 tablespoons olive oil
• 1/2 cup minced onion
• 1 clove garlic, minced
• 1/2 cup minced celery
• 2 tablespoons butter
• 1 pound lean ground beef
• 1/2 teaspoon white sugar
• 1 teaspoon salt
• 1/2 teaspoon dried mint
• 6 ounces fresh chopped mushrooms
• 1 (6 ounce) can tomato paste
• 2 (10.5 ounce) cans beef broth
• 2 teaspoons dried basil
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• 1 pound spaghetti
• 1 teaspoon olive oil
• 3 tablespoons salt
• 1 tablespoon chopped fresh parsley, for garnish
• 1/4 cup grated Romano cheese