Have your first meal 4-5 hours after you wake up. This makes your meal enjoyable, increases productivity, and gives you all the benefits of fasting.
Drink black coffee/sparkling water to curb your appetite. Do not intake caffeine right after you wake up. Wait for 2-3 hours before you have your first cup of coffee.
I have Kino Octane pre workout 15 minutes before my workout. It helps me with smooth, clean energy and insane focus.
I break my fast with Kino Collagen Protein mixed in hot water with a splash of oat/almond milk. To add more calories, I eat rice crispies in my first meal and a fruit (apple/banana). This takes my first meal's calorie count to ~500.
Here's the fun part. I have a full-fledged feast for dinner like a large steak and roasted potato wedges which add about 1,200 to 1,400 calories.
Finally, I have a chocolate bar as a late night snack to add ~500 calories.