Scrub the potatoes clean. Peel if desired, but I prefer to leave the skin. Cut them into 1-inch chunks.
Transfer the potatoes to the slow cooker and toss with olive oil. Sprinkle the seasonings on top and stir until everything is coated.
Cook on high for 2 to 3 hours or low for 4 to 6 hours until the potatoes are easily pierced with a fork. Stir about every hour to promote even cooking and to prevent the seasonings from burning. Cooking time will depend on the type and strength of your slow cooker. I used a fairly old model of a 4.5-quart slow cooker and it took about 3 hours on high to have fork-tender potatoes.
Serve garnished with chopped fresh parsley or chives if desired. Enjoy!
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Notes
Store leftovers in an airtight container in the fridge for up to 5 days.
Reheat in the microwave for 1 to 2 minutes until warmed through. For best results, reheat on a lined baking sheet in the oven for 10 to 15 minutes at 400 degrees F.