In a large salad bowl combine the bread cubes, mixed greens, cannellini beans and mint.
In a small jar combine the oil, vinegar, and mustard. Cover and shake until the vinaigrette is emulsified. Pour vinaigrette over the salad and toss to coat. Gently stir in the strawberries. Sprinkle goat cheese on top.
Cut the bread into bite-sized cubes. Spread on two baking sheets and toss with 2 Tbs. olive oil. Bake in a 350°F oven for 20 minutes, tossing once. Cool completely, and store in an airtight container.