Melt butter in a large nonstick skillet over medium-high heat. Stir in onion and garlic, and sauté 3 minutes or until tender. Stir in turnip greens, chicken broth, and, if desired, red pepper; cook 4 to 5 minutes or until liquid evaporates.
Sprinkle turnip green mixture with flour, and sauté 2 minutes. Gradually stir in milk, and cook, stirring occasionally, 3 minutes. Add cream cheese, stirring until melted. Season with salt to taste. Garnish, if desired.
Lightened Creamed Turnip Greens: Substitute 2% milk and 1/3-less-fat cream cheese for milk and cream cheese. Proceed with recipe as directed.