Trim the Brussels sprouts and cut in half lengthwise. Place on a baking sheet and toss with olive oil. Ensure they are all cut-side down once coated in oil.
Roast in the oven for 15-20 minutes, or until golden brown and tender-crisp*
Meanwhile, cook bacon in a large skillet until crispy. Remove to a paper towel-lined plate, then roughly chop. Set aside.
Tahini Lemon Sauce
In a medium bowl, whisk together the tahini, water, and lemon juice. The sauce needs to be quite thin and fluid.
Add in the remaining ingredients and stir to combine. Adjust seasonings to taste.
Once the Brussels sprouts are roasted and still warm, add to a large bowl and toss with the tahini lemon sauce, a little at a time until coated to your liking.
Top with cooked bacon, toasted pumpkin seeds and crumbled feta. Serve warm.
Notes
*Tender-crisp is when the Brussels sprouts are cooked and heated through, but still have a crispness to them and they aren't a soggy mess.