The best way to toast bread without a toaster is to throw slices on a skillet over heat and let them crisp up. It's easy and comes with a slew of other benefits.
Heat a pan or skillet on your stovetop over medium heat, and once it's hot, place your slices of bread on top. Let the bread toast, flip it over, and repeat for the other side.
The best pan for the job is a cast iron skillet, but you can also toast bread on any non-stick frying pan, a pancake griddle, or even a grill pan.
You can slather on oil or butter if you prefer. Spread your desired seasonings on the bread before you toast for even more browning and flavor, or add them once it's done.
Toasting bread on the stovetop gives you more control. With a skillet, you can heat, toast, and flip your bread for as little or as long as you want to achieve your ideal finish.
Unlike a toaster's size-confining slots, a frying pan or skillet allows you to toast your favorite bread every time, regardless of shape or size.