Instant Pot Mussels

Soak mussels in cold saltwater (3 cups of water + ¼ cup of salt) for about 15 minutes. Discard open mussels, scrub the shells, de-beard, and rinse until the water runs clear.
Select the "sauté" setting. When the pot displays "hot", melt butter. Cook garlic and shallots just until fragrant. Add diced tomatoes, cook for 1 minute. Add white wine and broth. Stir to combine.
Add cleaned mussels into the pot and secure the Instant Pot lid. Select the "manual" setting, adjust the pressure to "low", and set it to "1 minute". Once the cooking cycle is completed, carefully do quick release.
Transfer the mussels to serving bowls, discard the unopened ones. Taste the broth, season with salt and black pepper if needed. Serve the mussels with white wine sauce and a squeeze of lemon juice.