Thinly slice the cucumbers and lay on the prepared baking sheet. Sprinkle with the salt.
Let sit for 30 minutes at room temperature to allow the cucumbers to release their water.
Pat cucumbers dry, wiping away an excess salt, and add to a large mixing bowl with the red onion and garlic.
Whisk together the sour cream, vinegar, dill, sugar substitute, and pepper in a small bowl.
Pour the dressing mixture over the cucumbers and toss to coat.
Serve immediately.
Notes
Update - lately we've been adding fresh tomatoes to this and it's SO GOOD. Highly recommend, but be sure to count from the in the nutrition.If you're sensitive to salt, you can rinse the cucumbers after salting and then pat dry. We just wipe it off as we pat it dry.