In the bowl of a stand mixer, whisk together warm water and yeast. Rest for 5 minutes.
Add in flour, sugar, salt, and vegetable oil.
Mix on low with the dough hook until the dough starts to come together (about 8 minutes).
Transfer the dough to a greased bowl. Cover with a kitchen towel and let rise for 2 hours or until the dough has nearly doubled in size.
Turn the dough out onto a work surface.
Divide the dough into 12 even pieces (about 3 ounces each).
Working one piece at a time, fold the sides of the dough under to create a dough ball (top should be smooth).
With the seam side down (on an unfloured surface), place your palm on top of the dough (your hand should be slightly cupped around the dough ball).
Push down slightly (but firm and even) on the dough and roll the ball under your palm in a circular motion. Use the cupped sides of your hands to keep the dough centered in your palm. You may have to work the dough for a while, but eventually, it will come together and most of the lines and folds should have incorporated into the dough, forming a smooth dough ball.
Place the dough balls on a baking sheet and cover with a kitchen towel.
Rest for 15 minutes
After resting, use your fingers to create a hole in the center of the dough balls, twirling the dough around your fingers until you form about a 2-inch hole.
Preheat oven to 425 °F.
Line a separate baking sheet with parchment paper. Sprinkle evenly with cornmeal.
Add the water and honey to a large pot. Bring it to a rolling boil.
Reduce the heat slightly (still boiling) and add bagels in batches (3-4 at a time). Bagels should have room to expand and should not be overlapping at all.
Boil for 1-2 minutes per side (the longer the boil the denser the bagel).
Place boiled bagels on top of the cornmeal layer on your baking sheet.
In a small dish make your egg wash by whisking together the egg white and water.
In a second small dish, make your seasoning mixture by mixing together the poppy seeds, sesame seeds, garlic powder, dried onion, and sea salt.
Brush the tops of the boiled bagels with the egg wash and followed by a sprinkle of the seasoning mixture.
Bake in the preheated oven until the bagels begin to brown, 15 to 20 minutes.