Microwave approach: If you just want to make a few of these flower pretzel bites at a time, you could do them in the microwave. Just arrange 8-10 pretzels and white chocolate wafers on a plate lined with a piece of parchment paper. Microwave for about 45 seconds, just until the white chocolate starts to melt but isn't melted all the way. Remove and decorate with M&M's.