In a medium mixing bowl, combine the drained white beans and ripe avocado. Use a fork or a potato masher to mash them together until they form a creamy mixture, leaving some chunks for texture.

Gently fold in the chopped fresh herbs, artichoke hearts, diced scallions, and minced garlic into the avocado and white bean mixture. Drizzle in the juice and zest from half a lime or lemon.

Take four slices of your choice of whole grain or sourdough bread and lay them flat. Spread approximately one tablespoon of mustard on one side of each slice.

Layer a handful of fresh greens on the mustard-spread side of two slices of the bread. Scoop a generous portion of the white bean and avocado mixture onto the greens.

Add more artichoke hearts or sliced cucumbers on top of the filling. Place the other slices of bread on top, mustard side down, and give a gentle press to secure everything.

Slice the sandwiches diagonally for a stylish presentation and serve.