If I were fasting, what would I be avoiding? The Latins’ definition is one meal per day plus abstinence from meat. Iirc, you have different rules for different times of year.
The Dormition fast is supposed to be a strict one, no meat, eggs, dairy, cheese, oil, wine or fish with a back bone (so lobsters are OK!), but most people just stop eating meat. We can eat three meals a day but we’re not supposed to eat massive quantities.