you can quilt the blocks individually- then you add sashing strips to join them- there are a number of quilt as you go techniques- two to look at are (the cotton theory) and - the 6-hour quilt by elenor burns/quilt in a day.
the 6 hour quilt is different- as in you add strips to each side of a center- quilting each new addition- but if you look it over so you understand the process it will help you understand the process of adding the sashing strips- i would make the blocks then use the technique to add the strips just alot narrower than what her pattern calls for.
there are probably many tutorials on quilt as you go projects- and show us pic's as you go= when you have specific issues come up we can help.