If you're in Phase 4, have your sweet potato. Cut it up in quarters and have one or two pieces. Add a spoonful of coconut oil if you like. See how you do with that. Dairy is constipating, so the oil will probably work better for you than butter. If you find you need to adjust the amount or frequency of the oil or the potato (your body and the scale will let you know soon enough), you can make that up as you go along.

If you like avocado, try eating that, too. I sometimes eat one entire small Haas avocado for breakfast or lunch. It is delicious, nutritious, filling, and cures a multitude of ills!

High-water-content vegetables, melons and berries will add fiber and water to your diet, so go for those first. Cucumbers, tomatoes, celery, bell pepper, romaine lettuce are good choices. Add mayo to your tuna. Mash it in there good. Try canned pink Alaskan salmon as an alternative. Think lubricating and hydrating to fill you up and keep you more regular and not just "roughage" which can actually cause constipation!