In the same skillet, add the olive oil for the vegetables and warm it over medium heat.
Add the minced garlic and cook, stirring, until fragrant and just starting to turn golden, about thirty seconds.
Stir in the chopped yellow bell pepper and cook until it begins to soften, about three minutes.
Add the cherry tomatoes, salt, and pepper, and cook until the tomatoes start to burst, about two minutes.
Pile the spinach on top and pour in the lemon juice, then turn the spinach with tongs as it wilts.
Continue cooking until the spinach is just wilted but still bright green, one to two minutes.