Alexa's Gourmet Grilled Cheese

By AlexaS

3.25 / 5

10min

5min

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4 slices marbled rye bread divided
4 teaspoons softened salted butter or as needed, divided
2 teaspoons Dijon mustard or to taste
4 slices shredded sharp Cheddar cheese
4 slices Swiss cheese (such as Lorraine®)
1 tomato thinly sliced
1 avocado peeled, pitted, and thinly sliced