A steak, egg and cheese bagel from McDonald's has 660 calories, with 300 calories from fat. If you eat 2,000 calories a day, the breakfast sandwich amounts to one third of your total daily calories. McDonald's steak, egg and cheese bagel contains 33 g of total fat. The fat includes 12 g of saturated fat and1 g of trans fat. The sandwich also has 300 mg of cholesterol. The bagel sandwich has 1,580 mg of sodium, which equals 66 percent of the maximum recommended daily intake.