The plant is question is Garlic Mustard (Alliaria petiolata) which is an invasive weed. It starts as a rossette of green leaves that grows close to the ground in their first year, and develop into mature flowering plants in the following Spring. The weed spreads by seeds. Each plant can produce between 150-850 seeds and seeds can remain viable in the soil for up to 5 years. Once garlic mustard is established the goal to cultural control is to prevent seed set. Plants can be pulled out easily, especially if the soil is moist. Do not put pulled plants in the composter but put them in waste bags.
Please refer to the following link with more detailed information on control of this invasive weed: