I eat high protein, low carb but don't really watch how much fat I eat. I have lost 55kgs in a year eating like this.
I do use protein powder though which isn't for everyone.
A typical day for me would be something like;
Breakfast: Choc banana protein shake for made with light milk, protein powder, protein ice cream (whey whip), chobani yogurt, banana, ABC butter, chia seeds, cacao powder etc.
Lunch: Eggs with avocado & light mayo on lettuce wraps.
Dinner: steak and salad or fish & salad

Snacks are often chobani yogurt, edamame beans, haloumi cheese, nuts etc or just a protein drink.

At first it was really hard for me to eat this way but now it's habit and I love it. I really concentrate on eating protein as much as possible. I can imagine going back to eating how I once did.