Spaghetti Bolognese

Ingredients

• 1 tablespoon olive oil
• 1/4 pound ground beef
• 1/4 cup diced yellow onion
• 1 1/2 cloves garlic (minced)
• 1/2 teaspoon dried oregano
• 1/2 teaspoon salt, divided
• 1/4 teaspoon black pepper, divided
• 3/4 cup crushed tomatoes
• 1/4 cup beef broth
• 2 ounces spaghetti
• 1 slice French bread
• 1 teaspoon butter
• 1 cup arugula
• 1/2 tablespoon red wine vinegar