Burgers with Pigasso beef

I'm on a crazy burger kick the past month.... and last night was time for another. I was meeting Rob from Pigasso Farms at the Chatham Co-op Farmer's market to pick up a few pork shoulder's for Jack's b-day celebration next weekend, and while chatting with Rob decided to pick up a pound of his ground beef. A quick soak in water for a couple hours and we had thawed meat ready for the grill. I decided to prepare them with my standard oregano and worcestershire combo, and then remembered i had some bacon in the fridge from that mac and cheese. So, i decided to grill up the bacon in a foil "pan" on the grill:

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Then I figured a burger with mushrooms and onions would be good, so i grilled up four cremini's and a small red onion for about 10 minutes over the hot fire. After I took the bacon off the foil, i was thinking it's a shame to waste that bacon grease.... so decided to toss the veggies into the grease:
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I let them steam (closed it up) for 5-10 more minutes, and then chopped 'em up inside and added fresh ground pepper and salt:
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Sooooooo flavorful. Really great stuff! While all that was going on, i was grilling the burgers. I was lazy and didn't clean or oil the grates. Mistake! Peoples, this is what happens when you don't get that grate all cleaned up:
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Taste wasn't harmed by my laziness, but i get an insane satisfaction from how my meals look, so this gaffe was definitely a downer. Regardless, I served these plain at the table so we could each make our own burger combo. I went with bacon, mushrooms/onion, tomato, lettuce, ketchup, and mayo. And it was terrific:
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The Pigasso ground beef was great. I meant to ask what the fat content was, I'd guess its relatively lean. This was not a super juicy burger, but it was incredibly tasty. We split the third burger for lunch the next day, and even cold this burger packed some great beefy flavor. Really good stuff, and not too pricey at $5 a pound.