1Chop the onion and process it in a food processor.
2Mix ground beef with processed onion and garlic.
3Finely mince fresh flat parsley.
4Add fresh flat parsley, tomato paste, and a few easy spices (salt, cumin, smoked paprika, Aleppo pepper, cinnamon, oregano, minced serrano pepper) to the meat mixture.
5Mix the ingredients thoroughly and let it sit for 30-90 minutes.
6Grab a sheet pan, spray it with avocado oil, and spread the meat mixture out evenly across the whole pan to about 1/2 to 3/4 inch thick.
7Score the meat with a knife to create individual kabob shapes.
8Make little indentations with a spatula to give it that authentic kabob look.
9Pop the sheet pan into the oven and bake for 20-22 minutes at 425F.
10Slice red onions and tomatoes.
11Make a quick salad with tomatoes, onion, parsley, sumac, lemon juice, salt, and pepper.
12Prepare the tahini sauce by whisking tahini with grated garlic, lemon juice, cold water, and salt to taste until smooth and creamy.
13Remove the kabobs from the oven, spoon out excess liquid, mix with 1 tbsp tomato paste, and brush over the kabobs. Return to the oven to broil for 2.5-3 minutes.
14Let the kabobs rest a few minutes before cutting along the score lines.