Sauteed Radishes and Onions

This recipe may sound odd, but it's my new obsession.  In our CSA box the past few weeks we've been getting watermelon radishes.  They look like this:

I'm not a huge fan of raw radishes, but I did some exploring online and found out that radishes can be sauteed and are very delicious this way.  I came up with this recipe to use those interesting new vegetables and I think I could eat it every day....

Sauteed Radishes and Onion

1 sweet onion
2-3 large watermelon radishes
2 T grass fed butter

Dice onion.  Cut radish into bite-sized pieces.  Add butter to a large skillet and heat on medium high.  Once the butter is melted, add the onion and saute until it starts to brown a bit.  Then add the radishes, as well as some salt and pepper, and continue to cook until the radishes being to soften.  Taste the radishes to see if you like them this way or continue cooking until they are even softer.  Enjoy!