Hi Linda,
A few snack ideas are:
1. 1 small or medium apple, dust some cinnamon on it and eat it with 2 tbsp. cottage cheese or apple & 1 tbsp. peanut butter. I usually eat less than a tbsp of peanut butter.

2. Low-fat Greek yogurt, 2 to 3 dried pitted plums, 1 tbsp walnut, 1 tbsp. raisins, a few pieces of chocolate chips. I sometimes add a tbsp. of shredded coconut. These ingredients would add some sweetness to your Greek yogurt if it is plain and very sour. Or drizzle a tsp. of honey on it. Mix it up and enjoy.

3. Try your hands on oatmeal banana muffins.
Preheat your oven at 350
First, blend 2 cups of oatmeal plus 1/4 tsp. baking soda, 1/2 tsp. baking powder, a dash of salt, add 1 tsp. cinnamon and nutmeg together.
Then blend 2 very ripe medium bananas with 1 egg, 1 tbsp. vanilla extract, 1/2 cup of sour cream, or Greek yogurt.
Mix the dry and wet ingredients in a wide bowl.
Then add 1/2 cup raisins and/or chocolate chips, 1 to 2 tbsp melted butter. Mix until well combined.
Next, scoop tablespoons full onto a cookie tray lined with parchment paper or aluminum foil, and bake at 350 for about 10 to 15mins.
When these are ready, they’d rise and you’d smell it in your kitchen. They are usually soft like bread or like applesauce cookies, but very filling.
I think this measurement makes about 10 to 12 pieces.
I eat 1 or 2 with a glass of milk/coffee/green tea/water and it satisfies.

4. One more thing, don’t forget the regular hard-boiled eggs, carrot sticks or baby carrots, etc.

These are things I learned from fitness trainers, dieticians, etc., and I’ve tweaked them to work for me.
So find what works for you too. And make sure to include some protein in every meal or snack you eat.
I hope this helps.
xx, Buayifa.