Potatoes, Gruyere & Caramelized Onion Tart

Call it a galette and feel fancy or call it a tart and feel cute. Either way, this sucker was delicious. I used sweet potatoes, white potatoes, gruyere cheese, and caramelized onions tucked inside a not-fussy crust. This #MeatlessMonday plan was hatched when I was inspired after seeing some other posts around like a flaky crust when Eats Well With Others posted a galette with Asparagus & Gruyere  and I wanted all the cheese and potatoes when Bev Cooks posted these Cheesy Skillet Potatoes.
The Three Bite Rule - Potato Tart

We ate this on a drizzly night with a quick arugula salad. It absolutely hit the spot for me. The cheese is the perfect splurge and has perfect nutty meltyness for this. The rest of this is so super cheap so go for the good cheese! Shred it yourself, or slicing/dicing it is fine too!

Potato, Gruyere & Caramelized Onion Tart

Ingredients: (for 1 small tart, feeds ~3 for a meal, or ~6 for a side)

1 sheet pie crust (mine was a roll defrosted from the freezer)
1/2 – 1 small onion
1 sweet potato
1 white potato
~4 oz/1 cup shredded Gruyere cheese (sometimes labeled Alpine style if not imported from Switzerland/France)
2 tablespoons butter
1/4 teaspoon each rosemary, thyme, garlic powder
salt & pepper

Directions:

Bring the pie crust to room temperature.
Slice the onion and add to a skillet over low heat with a drizzle of olive oil/butter. Stir regularly and cook for ~30 minutes until caramelized. (I did this the night before).
Peel the potatoes and cut in thirds. Boil for ~5-8 minutes, until the outsides are getting soft but not cooked all the way through. Then slice into thin disks. A mandolin made this faster (that was my tactic). Or, peel and slice into thin disks and roast in the oven for ~10-20 minutes at 350-degrees.
While the potatoes cook, shred the cheese.
The Three Bite Rule - Potato Tart
Melt the butter and mix in the rosemary, thyme, garlic powder, and salt & pepper.
Spread out the pie crust onto a sheet of parchment paper, baking mat, or baking sheet well sprayed with non-stick spray.
Leaving 1-2 inches around the outside, layer half of the potato slices, half the cheese, and a quarter of the onions. Sprinkle cheese over and drizzle half the butter/herb mixture.
The Three Bite Rule - Potato Tart
Repeat for another layer reserving a few potato slices to be the very top.
Working around the tart, fold crust inward then turn and fold more crust inward and repeat all the way around.
The Three Bite Rule - Potato Tart
Bake 20-30 minutes at 375 degrees. (I baked ~20 minutes when prepping in advance and baked another 10-15 before serving.)
The Three Bite Rule - Potato Tart
Let sit for a few minutes before serving. Enjoy!
The Three Bite Rule - Potato Tart

I prepped this in advance, I know, story of my life. It comes together quickly but getting home on a weeknight with a toddler and two hungry dogs means dinner is really nice when mindless. I baked 20 minutes when I prepped it and another 15 to heat through before serving. I literally partially baked it and kept it on the parchment and covered it in the fridge for the day. Then I uncovered it and slid the parchment back onto a baking sheet that night.

Should we do a cost breakdown? Let’s! I haven’t in forever!

Cost Breakdown (for what was used)

Potato, Gruyere & Caramelized Onion Tart
1 frozen sheet pie crust = $1.59
onion = $0.89
white potato = $0.75
sweet potato = $1.10
Gruyere = $5.99 (used half) $2.99
= $7.32 or ~$2.44 for about 3 servings

Does that sell you on making this for dinner or your next gathering? It is so cheap!

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