Breakfast: 2 fried eggs in grass fed butter, side of sliced turkey (from whole foods in store made), boiled broccoli, cup of black tea with lemon, supp: fish oil, vitamin D

Snack: grapes, apple

Lunch: Left over beef stew (ingredients: beef, carrots, celery, onion, sweet potato, chicken stock, red wine, spices, olive oil).

Snack: handful of almonds

Dinner: Mark's style big ass salad (greens, tomato, cucumber, pepper, grilled chicken breast, olive oil, vinegar), supp: fish oil, vitamin D, magnesium (Natural Calm)

Do I need to change anything from long term health and weight loss perspective. I already lost 30 lb, but would not mind to lean out more (from 4 pack to 6 pack).

Exercise 4-5 times per week, HIIT and weight lifting

looks absolutely fine...as Warren said the sweet potato isn't paleo but it's not the end of the world.  Maybe consider dropping it and replacing the calories with fat, or if you want carbs, going for a paleo root vegetable like parsnips or turnips?

Personally, I find chicken breast too lean and would get starving if that's all I had at dinner!

Do you eat this every day?  Personally I think variety is important so I would consider adding in some trout or salmon or seafood, for the minerals and O3s, and some different kinds of meat aside from beef and chicken, especially lamb or venison