To avoid tempering the chocolate you should use semper chocolate. This type of chocolate doesn't have to be tempered due to its high fat content. Sinice your in a rush just break off a little bit off the block and melt in the microwave, 10sec at a time, for about 30 sec. Remember to stir often.
I've done this as described above and it works fine. Sometimes I melt some white chocolate and drizzle it over the dark chocolate. I usually set the dipped berries on parchment paper so they're easy to remove.
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