In a large mixing bowl, combine the flour, sugar, salt, and yeast. Stir to combine.

Gradually add the warm water and stir until the dough forms. Add more water if necessary, one tablespoon at a time.

Knead the dough on a lightly floured surface for about 10 minutes, until smooth and elastic, or use a stand mixer with a dough hook.

Grease a clean bowl with vegetable oil, place the dough inside, and cover with a damp towel. Let the dough rise for 1 to 1.5 hours, until doubled in size.

Punch down the dough, divide into 8 equal pieces, and shape each piece into a ball.

Use your finger to create a hole in the center of each ball, gently stretching it to form a ring. Place the shaped bagels on a parchment-lined baking sheet.

Bring a large pot of water to a boil, adding baking soda. Drop the bagels into the boiling water, one at a time, and boil for 1-2 minutes on each side. Remove with a slotted spoon and place back on the baking sheet.

Preheat the oven to 425°F (220°C). Add toppings if desired.

Bake for 20-25 minutes until golden brown and crispy.

Cool on a wire rack before slicing and serving.