1 cup parsley
1 cup spinach
1-inch ginger
1-inch turmeric
2 celery sticks
½ cucumber
juice of 1 lemon
stevia powder to taste

Wash and cut everything in small pieces. Place in a blender and blend until well ground. Add stevia to taste. Drink immediately.

Cal: 99 - P: 5.3 - F: 0.37 - Cb: 18.2

You can replace it with a fruit or portion of fruit, if you have fruit in your plan. Or for a whole wheat bread or rice cracker, if you have bread or chicken in your plan.
If you don't want to use it as a replacement, you can add it to your plan without replacing anything, one day of the week at your snack or lunch