Quick Easy Healthy Smoothie

I've been making lots of smoothies lately-- mostly with honey or sugar, frozen strawberries and tropical fruit that I buy in big bags at Costco, yogurt and milk. However, in an effort to add a little secret veggie goodness, I did this last week and it worked great! I took my husband's juicer and made carrot/spinach/apple juice, and froze it in these cute ice cube trays I got at the DI. I would like some normal trays, too, but they didn't have any that day. I toss a few in each batch of smoothie and you can't see, smell, or taste the veggies, but it does my heart good to think my family is getting a little extra something...